[Isocops] [Not Virus Scanned] IBEX Orbit #543 ATS Approval (02 - 11 Oct, 2021)
Carol Weaver
Carol.Weaver at unh.edu
Wed Sep 22 09:43:59 EDT 2021
Hi all,
I have looked at the orbit 0543 ATS file, IBEX_2021_275_o0543a_v001.scr and I approve.
The constraint violations in IBEX_2021_275_o0543a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2021_275_o0543a_v001.scr match those in the STF, IBEX_2021_275_o0543a_v002.stf.
Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF, IBEX_2021_275_o0543a_v001.oef and as verified with ibex_orbit.
No star tracker outage this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit543_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 1 hour away from maneuver.
The Inertial maneuver at perigee of orbit 0542 left us pointing in safe directions for the orbit 0543 arc A ascending and descending sequences:
ibex_rotate -o -u -0.993511,-0.100444,-0.053347 -w ibex-sun -t 2021/10:02:14:52:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993511,-0.100444,-0.053347
which is R.A. +185.773 Decl. -3.058
missing R.A. +188.595 Decl. -3.727 (ibex-sun)
error is R.A. +2.822 Decl. +0.669
for a total 2.895 deg
ibex_rotate -o -u -0.993511,-0.100444,-0.053347 -w ibex-sun -t 2021/10:06:04:24:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993511,-0.100444,-0.053347
which is R.A. +185.773 Decl. -3.058
missing R.A. +191.733 Decl. -5.033 (ibex-sun)
error is R.A. +5.960 Decl. +1.975
for a total 6.264 deg
The Inertial precession maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences:
ibex_rotate -o -u -0.98186,-0.169738,-0.084495 -w ibex-sun -t 2021/10:06:06:07:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.981860,-0.169738,-0.084495
which is R.A. +189.808 Decl. -4.847
missing R.A. +191.797 Decl. -5.059 (ibex-sun)
error is R.A. +1.989 Decl. +0.212
for a total 1.993 deg
ibex_rotate -o -u -0.98186,-0.169738,-0.084495 -w ibex-sun -t 2021/10:06:07:43:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.981860,-0.169738,-0.084495
which is R.A. +189.808 Decl. -4.847
missing R.A. +191.857 Decl. -5.083 (ibex-sun)
error is R.A. +2.049 Decl. +0.236
for a total 2.055 deg
ibex_rotate -o -u -0.98186,-0.169738,-0.084495 -w ibex-sun -t 2021/10:10:16:17:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.981860,-0.169738,-0.084495
which is R.A. +189.808 Decl. -4.847
missing R.A. +195.950 Decl. -6.777 (ibex-sun)
error is R.A. +6.142 Decl. +1.930
for a total 6.407 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0544 apogee:
ibex_rotate -o -u -0.964813,-0.237517,-0.112787 -w ibex-sun -t 2021/10:10:19:40:35
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.964813,-0.237517,-0.112787
which is R.A. +193.830 Decl. -6.476
missing R.A. +196.085 Decl. -6.839 (ibex-sun)
error is R.A. +2.255 Decl. +0.363
for a total 2.269 deg
ibex_rotate -o -u -0.964813,-0.237517,-0.112787 -w ibex-sun -t 2021-10-15T12:57:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.964813,-0.237517,-0.112787
which is R.A. +193.830 Decl. -6.476
missing R.A. +200.349 Decl. -8.561 (ibex-sun)
error is R.A. +6.519 Decl. +2.085
for a total 6.791 deg
There is no overlap with orbit 0542 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: NIgel Angold <nangold at princeton.edu>
Date: Tuesday, 2021-September-21 at 22:04
To: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Cc: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.com>, IBEXOPS at gmail.com <IBEXOPS at gmail.com>, isocops at lists.sr.unh.edu <isocops at lists.sr.unh.edu>, fair-play at comcast.net <fair-play at comcast.net>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting at earthlink.net <angoldconsulting at earthlink.net>, Paul.Janzen at mso.umt.edu <Paul.Janzen at mso.umt.edu>, Tyler, Ryan S [US] (SP) <Ryan.Tyler at ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley at ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn at ngc.com>
Subject: Re: [Not Virus Scanned] [Isocops] IBEX Orbit #543 ATS Approval (02 - 11 Oct, 2021)
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.
I approve IBEX_2021_275_o0543a_v001.scr
Nigel
All,
Attached are the planning files for Orbit #543. Please respond to this thread with comments and approvals.
Approvals are required by 16:00, 22 Sept 2021
Please note the following:
1. Battery Balancing this orbit
Begin 2021/10/11 02:00:00– End 2021/10/11 03:30:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2021_275_o0543a_v001.ccvr
# Input files: 1
# IBEX_2021_275_o0543a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/10/02 12:05:17 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/10/06 07:13:02 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com<mailto:timothy.perry at ngc.com>
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D7AF96.5C9B3630]
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